Dynamic allocator: Dynamic allocator keeps the heap as a group of several size blocks; each block is an attached portion of virtual memory which is allocated or free. An allocated block has been clearly kept for use by the application. A free block is offered to be allocated. Two types of allocators: 1. Explicit allocators 2. Implicit allocators Explicit allocators: Explicit allocators need the application to explicitly free any allocated blocks. Implicit allocators: Implicit allocators is the method of automatically releasing vacant allocated blocks. This is also known as garbage collection. Implicit free list: In this method, a block contains one word header, payload and additional padding. The header encrypts the block size, which contains header and padding; and check the block is allocated or free. If the arrangement is single-word, the block size is constantly a multiple of “4” and the low-order bits of the block size are always zero. If the arrangement is double word, the block size is constantly a multiple of “8” and the low-order bits of the block size are always zero. Thus, essential to store only the high-order “29 bits” of the block size, freeing the remaining “3 bits” to encrypt other information. Here, smallest significant bits is using to represent the block is allocated or free.

Question

Want to see the full answer?

Answer 1

Question

Chapter 9.9, Problem 9.7PP

Program Plan Intro

Dynamic allocator:

Dynamic allocator keeps the heap as a group of several size blocks; each block is an attached portion of virtual memory which is allocated or free.

An allocated block has been clearly kept for use by the application.

A free block is offered to be allocated.

Two types of allocators:

1. Explicit allocators

2. Implicit allocators

Explicit allocators:

Explicit allocators need the application to explicitly free any allocated blocks.

Implicit allocators:

Implicit allocators is the method of automatically releasing vacant allocated blocks. This is also known as garbage collection.

Implicit free list:

In this method, a block contains one word header, payload and additional padding. The header encrypts the block size, which contains header and padding; and check the block is allocated or free.

If the arrangement is single-word, the block size is constantly a multiple of “4” and the low-order bits of the block size are always zero.

If the arrangement is double word, the block size is constantly a multiple of “8” and the low-order bits of the block size are always zero.

Thus, essential to store only the high-order “29 bits” of the block size, freeing the remaining “3 bits” to encrypt other information.

Here, smallest significant bits is using to represent the block is allocated or free.

Expert Solution & Answer

Want to see the full answer?

Check out a sample textbook solution

See solution

Students have asked these similar questions

Whats wrong with my pseudocode? Where did I make an error?Code: Module main() Declare Real mileage Call getMileage() Display “You’ve drive a total of “, mileage, “ miles End Module Module getMilage() Display “Enter your mileage: “ Input mileage End Module

I need help!! Writing a long pseudocode for a modular program that will display the monthly payment on a mortgage. P=Principal amount borrowed (loan)R=Rate of interest computed for each monthN=Number of months to pay back the loan or mortgageThe help I need is creating a module that you can input the principle, rate of percentage, and years to repay the loan, and another module "displaypayment" that accepts the 3 values and calculates the monthly payment needed for the rates. Lastly 2 local variables needed!Equation:Monthly Payment=[(R*(1+R)^N)/((1+R)^N-1)]*P

Two pseudocode questions I need help with: How do I design a module called findSum that will display the sum of two integer passed by parameter, and a module called findArea that will display the area of a rectangle when passed 2 real values for the length and width of the rectangle?